In 2367, hyronalin was used to protect the crew of the USS Enterprise-D from radiation poisoning when a three-hundred-year-old garbage scow was discovered. DoctorCrusher and her staff mass-replicated the drug and prepared to coordinate with Gamelan V's physicians in the administration of it. These actions were taken in response to projected radiation levels that would mostly have affected a trio of islands on the planet. (TNG: "Final Mission")